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' Patented Sept. 8, 1885 N. HICKS 8v G. A. METGALF.

GARD eRINDINe MACHINE.

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shaft, S, carrying the grinding-wheel G, are

case the shaft S may be lifted from its bear- UNITED STATES PATENTOFFICE..

METCALF, OF WOONSOCKET, RHODE ISLAND.

CARDi-GRiNDlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 325,744, datedSeptember 8, 1885.

Application ltd July 2, 1884. (No model.)

T0 all whom it may concern,.-

Be it known that we, NEHEMIAH HIoKs, of Attleborough, 'Bristol county,Massachusetts, and GEORGE A. MnTcALF, of Woonsocket, Providencecounty,Rhode Island, have invented certain new and useful Improvements inCard-Grinding Machines, of which the following is a specification. p

' Our invention relates to that class of grinding-machines especiallyadapted for grinding cards, in which the grinding-wheel rotates withand'travels back and forth upon the driving-shaft; and our inventionconsists in combining with the said wheel a drivingchain movingcontinuously in one direction, and a yoke and link connection,wherebythe traversing movement of the wheel is effected by the action of thesaid chain. p

In the drawings, Figure l is a front eleva tion in part section ot' ourimproved grinding-machine. Fig. 2 is an cnd elevation. Fig. 3 is a planof the chain-supporting rod and driving mechanism.

A A represent portions of the stationary part of the machine, to whichare jointed arms a a', which, with a cross-bar, E, constitute a swingingframe, and the bearings of a between the two frames, so that the frame Bmay be swung on pivots a back to the position shown in dotted lines,Fig. 2, in which ings. When the frame B is in the position shown in fulllines, Fig. 2, it is retained by means of bolts Z). The shaft S has alongitudinal groove, x, into which enters the conical end of a pin, c,projecting from the grinding-wheel; and this end of the pin may, ifnecessary, vbe provided with a conical friction-roller, so that thegrinding-wheel may be carried back and forth longitudinally upontheshaft S while turning therewith, the combined rotary and traversingmotions of the grinding-wheel causing it to operate upon the entirewidth of the card or other object to be ground. The traversing motion ofthe wheel is imparted from a continuously-moving chain, F, carried bysprocket wheels or pinions H H', supported by the bar E, and connectedbya link, L, to a stud, d, upon a yoke, Y, in which the hub of thegrinding-wheel revolves, the connection being formed by a pin, z', on

the link,which tits a notch in the end of the stud.

As shown, the grinding-wheel is provided with a central web, e, whichextends from the hubfof the wheel to the rim g, as shown in Fig. l, andthe yokeYis in two sections,eaeh of which consists of a ring, h, ttingloosely 'upon an annular flange, s, of the hub, and a Secured to orforming part of the wheel H'l is a bevel-gear, n, which gears with abevelpinion, a', connected to a shaft, p, which extends through thehollow end otl the rod E, and carries a pulley, P, driven by means of abelt, P2, from a pulley, P', upon the shaft S.

AThe link Lis connected to the chain, and the pivot ,c'onnecting saidlink with the yoke Y, is directly opposite the center of the rod E,

so that as the link approaches either of the c wheels H H and is carriedaround the latter with the chain the pin i will, during such movement,coincide with the axis of said wheel` so that the yoke, and'with it thegrinding-wheel, will be carried upon the shaft S, iirst to one end andthen to the other, back and forth, while the rotation of the wheel iscontinued. By this means a positive tra-versing action is imparted tothe grinding-wheel with butlittle friction and through the niedium ofcomparatively simple appliances.

It will be seen that the carrying-pin t' and its supports and drivingappliances are all carried by the hinged frame B, so that the parts mayat any time be swung back out ol' connection with the grinding-wheelafter removing the bolts b, the pin slipping out of the notch in thestud d.

By making the yoke Y in two sections bolted together and fitted toopposite sides of the wheel, it can be readily applied or removed, andwhen in place affords a medium of communication from the chain to thegrinding- `wheel with comparatively little friction. By

balancing the yoke Y so that it will remain IOO in an uprightpositionwhen disconnected from the driving appliances, it is .prevented fromswinging down and injuring the card when thus disconnected.

To compensate for wear or stretch of the driving-chain F,we providemeans for adjusting the wheels H H to a greater or less distance apart.rlhus the rod E may consist of three parts, l 2 3, the parts l and 3carrying the bearings of the wheels H H', and having threaded sockets toreceive the threaded ends ofthe part 2, the threads running in oppositedirections, so that by turning the part 2 the parts l and 3 may beseparated or brought together. in the position to which they areYadjusted,and set-screws u hold the sections l and 3 firmly in theirbearings.

A belt or cable may be used instead of the chain F, and othermeans thanthose described may be employed for tightening the same and iorimparting a continuous movement thereto in one direction; and the yoke Ymay consist of, a single ring and arm at one side of the grinding-wheel,in which case it Will be confined to the hub by means of an annularcollar, y. (Shown in dotted lines, Fig. l.)

Without limiting ourselves to the precise arrangement and constructionof parts shown, we claiml. Thecombination,witharotatingshaft,andgrindingwheel connected to slide upon said shaft, of a continuousdriving belt or chain arranged outside of and parallel to said shaft,and 'a yoke encircling the hub of the grindingwheel, and provided withan arm connected by a pivoted link to the driving belt, substantially asSet forth.

2. The combination, with the rotating and sliding grinding-whee1 andyoke connected thereto so as not to turn therewith, of a continuousdriving-chain carrying alink pivoted Jam-nuts t serve to secure thepartstothe yoke at a point midway between the sides of the chain,substantially as set forth.

3. The combination,with the shaft carrying the rotating'and slidinggrinding-wheel, of a yoke encircling the hub of said WheeLaswingingframe carrying supporting-Wheels, and a continuous chain passing aroundsaid supporting-wheels and connected by a link tothe yoke, substantiallyas described.

4. The combination, with the rotating and sliding grinding-wheel anddriving-chain, of a yoke having an arm connected by a link to said chainand a ring encircling an annular Iiange, s, substantially as set forth.

5. The combination of the sliding and rotating grindingwheel, providedwith annular flanges s upon the opposite ends, and a yoke consisting oftwo independently-detachable ring-sections having arms extending aroundand connected detachably together opposite the rim of the wheel,substantially as described.

6. The combination, with the sliding and rotating grinding-wheel, ofayoke inclosing a iiange thereof and Weighted at the lower' side, for thepurpose set forth.

7. The combination of the main frame and a swinging frame, B, pivotedthereto,carrying a driving-chain,and ashaft carrying the grinding-wheelhaving its bearings between the two frames and connections between thedriving-chain and grinding-wheel, substantially as described.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

NEHEMIAH HICKS. I GEORGE A..METCALF.

Witnesses:

J. M. DAGGETT, J r., NANCY M. DAGGETT.

